Waterproof and grease-proof material for the manufacture of containers.



H. L. G. MOORE.

WATERPROOF AND GREASE PROOF MATERIAL FOR THE MANUFACTURE OF CONTAINERS.

APPLICATION FILED NOV. 14,1912.

1,091,527, Patented Mar.31,1914.

WITNESSES m [AWE/V703 I r I z wwz vdm, HIS ATTORNEYS.

STATES PATENT OFFICE.

EIERBERT L. G. lYlIOORE, OF RICHMOND HILL, NEW YORK, ASSIGNOR OF ONEHALF TO HIMSELF, ONE-HALF TO HENRY A. VREELAND, OF NORTH PATERSON, NEW

JERSEY.

WATERPROOF AND GREASE-PROOF MATERIAL FOR THE MANUFACTURE OF CONTAINERS.

Specification of Letters Patent.

Serial No. 731,435.

To all whom it may concern:

Be it known that I, HERBERT L. G. MOORE, a citizen of the UnitedStates, residing at Richmond Hill, in the county of Queens, in the State of New York, have invented an Improvement in lVaterproof and Grease- Proof Material for the Manufacture of Containers, of which the following is a specification.

My invention relates to material for the manufacture of containers for liquids, jellies, oils and greasy substances, and its object is to provide a material out of which such container may be constructed, which will be proof against the penetration of any of such substances.

In carryin out my invention I take unglazed vegeta le paper and dip it for thirty seconds into cold dilute sulfuric acid (1 part sulfuric acid and 21} parts water). It is afterward washed, and the fiber is thereby toughened by chemical action. A waterproof and partially grease-proof paper is thus produced. I then produce a paper from wood fiber pulp, treated by washing, bleaching, filtering, hot pressing and glazing. This paper is positively grease-proof, but not entirely water-proof. I have discovered that by uniting these papers in the manner hereafter described, a material is produced that will positively resist liquid and oily or greasy substances.

In the accompanying drawing I have shown by a diagrammatic elevation an apparatus by which these papers may be united, although I doanot limit myself to the particular apparatus shown, as any suitable apparatus may be employed, whereby the waterproof paper is carried through a paste receptacle, and with the grease proof paper on both sides then carried between pressure rollers.

1, 2 and 3 indicate three rollers.

t indicates a paste receptacle.

5, 5, indicate two parallel rollers, nor mally held in contact with each other by the pressure of springs 6, 6.

7, illustrates a winding drum.

The water-proof paper is wound upon the roller 2, and its free endis carried up through an opening in the bottom of the paste receptacle 1, and between the pressure rollers 5, and then over the winding drum 7. The opening in the bottom of the paste receptacle 4, is normally closed by flap valves 8.

The desired quantity of greaseproof paper is wound upon both the rollers 1 and 3 and the free end of each roll is carried on either side of the sheet of water-proof material between the pressure rollers 5, and then over the winding drum 7 The tension of the springs 6 is sutficient to produce considerable pressure of the rollers 5 upon the paper between them, and it is preferable that these pressure rollers be suitably heated.

If desired suitable brushes or scrapers 9, may be arranged at the top of the paste receptacle 4, on either or both sides of the water-proof paper, so as to insure an even pasting on both sides of such paper, and to take off any surplus paste or foreign matter that might unintentionally be mixed with the paste.

By the process described the three sheets of prepared paper are united into a solid substance, which is incapable of being split or separated, and which is impervious to water or oily or greasy substances and is particularly adapted for the manufacture of drinking cups, containers for oils or greasy substances, jellies and other food products.

I claim as my invention:

1. As a new article of manufacture, a grease-proof and water-proof material composed of unglazed vegetable paper treated with a bath of cold dilute sulfuric acid, and glazed paper of wood fiber pulp united by an adhesive substance and pressed into a solid body.

2. As a new article of manufacture, a grease-proof and water-proof material composed of an inner layer of water-proof and partially grease-proof paper, and a layer on each side thereof of grease-proof paper, said layers being united by an adhesive substance and pressed into a solid body.

Signed by me this 11th day of November HERBERT L. G. MOORE. Witnesses:

BERTHA M. ALLEN, Manna D. WOHLERS.

Patented Mar. 31, 1914. 

